LT1737IS#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1737IS#PBF is a current-mode PWM flyback switching controller operating from 4.5 V to 20 V input, housed in a 16-pin SOIC package. Designed for isolated DC-DC flyback converters in telecom, industrial power supplies, and battery charger applications.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- LT1737IS#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $4.9000(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode PWM control for inherent cycle-by-cycle overcurrent limiting
- Input voltage range: 4.5 V to 20 V covering 5 V logic and 12 V automotive rails
- Flyback topology support enabling isolated output voltage generation
- Programmable oscillator frequency for optimizing transformer size versus switching losses
- 16-pin SOIC package with standard PCB footprint for easy layout
- Built-in gate drive output for external MOSFET switching
Applications
The LT1737IS#PBF is primarily used in isolated flyback DC-DC converters for telecom line cards, industrial instrumentation, and distributed power architectures requiring galvanic isolation between input and output rails. Its current-mode control and 4.5 V to 20 V input range make it well suited for 12 V bus to isolated 5 V or 3.3 V supplies powering sensitive analog circuitry. Designers also employ it in battery charger circuits and AC-DC off-line auxiliary power stages where a compact 16-SOIC footprint is required.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1610 (S16) |
| YTEOL | 9 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 20V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 14V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 15mA |
| Surface Mount | YES |
| Switcher Configuration | SINGLE |
| Switching Frequency-Max | 250kHz |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does LT1737IS#PBF support, and does it cover both 5 V logic and 12 V automotive rails?
The LT1737IS#PBF operates from 4.5 V to 20 V input, covering a 5 V logic bus directly and a 12 V automotive or telecom rail without an additional pre-regulator. The 14 V nominal rating aligns with standard 13.8 V vehicle battery voltages, making it practical for automotive auxiliary isolated power supplies.
Why is current-mode PWM control preferred in flyback converters, and how does LT1737IS#PBF implement it?
Current-mode control senses the switch current each cycle and terminates the on-time when the peak current matches a control setpoint, giving inherent cycle-by-cycle overcurrent protection. In the LT1737IS#PBF, this means a shorted output is handled without additional fault circuitry, and the converter responds to input voltage transients within one switching cycle—typically sub-microsecond response—compared to voltage-mode controllers that react over multiple cycles.
What package does LT1737IS#PBF use, and how does its footprint simplify PCB layout for an isolated power module?
The device uses a 16-pin SOIC package (10.3 mm x 7.5 mm body, 1.27 mm pitch), which is a widely supported standard footprint in EDA libraries and assembly houses. The 16-pin count provides enough dedicated pins for oscillator programming, compensation, gate drive, and sense inputs without requiring external multiplexing, simplifying the PCB layout of the control section in a compact 25 W flyback module.
What are the procurement considerations for LT1737IS#PBF given its YTEOL rating and lead-free (PBF) suffix?
With a 9-year estimated time to end-of-life, the LT1737IS#PBF should remain available through approximately 2033, supporting long-lifecycle industrial designs. The #PBF suffix designates a lead-free, RoHS-compliant tin-silver-copper finish, which is mandatory for CE-marked equipment sold in the EU and preferred for REACH compliance audits in global supply chains.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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